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KMID : 0357220110230050001
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Journal of Korean Society Physical Therapy
2011 Volume.23 No. 5 p.1 ~ p.5
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Changes of Postural Sway and Muscle Activation While Standing Upright and Performing a Dual Task
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Choi Jin-Ho
Lee Han-Suk
Chang Jong-Sung
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Abstract
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Purpose: This study was designed to investigate the changes of postural sway and muscle activation while standing upright and performing a dual task.
Methods: Nine healthy adults were recruited and provided their written informed consent. They performed a balance task with and without a cognitive task on a force flatform (Good balance, Metitur Ltd., Filand). Postural sway was measured as medio-lateral and anterior-posterior distance and the velocity of the center of pressure and muscle activations of the ankle dorsi- and plantar-muscle was measured. The recruits completed three trials and the data was analyzed by a paired t-test.
Results: There were significant differences in the medio-lateral and anterior-posterior distance and the velocity of the center of pressure, and significant increases in the muscle activities of the tibialis anterior.
Conclusion: These findings revealed that performing a dual task increases postural sway and muscle activation of the ankle when simultaneously maintaining balance and performing another cognitive task. Future studies should focus on balance training with a dual task for patients.
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KEYWORD
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Balance, Dual task, Muscle activation, Postural sway
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